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Carat Hunter · Where to buy diamonds

Where to buy a 0.5ct lab-grown radiant diamond

Every retailer in our index stocking this size and shape, 45 of them, across 28,850 live listings.

Updated September 16, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

28,850

Retailers carrying

45

Median active price

£206

Grade combinations

26

Certificate mix:IGI 28,217 · GCAL 126 · GIA 56 · HRD 6

What it actually costs

Lower 10% £76Median £206Upper 10% £490

Middle half sell between £135 to £355

Certificated stones with a live price only, 6,202 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

245%

Typical difference

£346

Stones compared

3,319

Across 3,319 stones of this size and shape carried by more than one retailer, the dearest listing sits 245% above the cheapest for the identical certificated diamond, a typical gap of £346. That gap is what comparing before you buy avoids.

Every retailer that stocks this spec

Ranked by active inventory count. Selection is mechanical, not editorial.

Show 15 more retailers

Stock counts are updated daily. Founded, return window and shipping details are retailer-provided and were last verified September 2, 2026.

8 of the 25 retailers ship to United Kingdom. 17 do not.

Narrow it down by grade

Each combination below has its own page with the retailers that stock exactly that grade.

D VVS18,013 · 36rD VVS27,044 · 39rD VS13,359 · 32rE VVS22,103 · 34rD IF1,905 · 31rE VS11,576 · 32rE VVS11,322 · 33rD VS2606 · 27rF VVS2593 · 29rE VS2330 · 21rG VVS2317 · 27rF VS1310 · 27rG VS1285 · 24rE IF237 · 30rD FL171 · 18rF VVS1132 · 27rF VS2128 · 19rG VS2119 · 19rH VS178 · 15rE FL43 · 17rG VVS135 · 18rF IF29 · 17rH VVS229 · 17rH VS226 · 16rH VVS113 · 6rI VS212 · 9r

Stones at this spec now

Live examples carried by more than one retailer, so the comparison is real. Prices shown in USD.

What this spec means

  • Radiant: a rectangular brilliant cut that combines the emerald outline with round-style faceting.
  • Lab-grown: chemically identical to natural diamonds, typically 60% to 80% less than a comparable natural cohort.

Frequently asked

How much do retailers differ on the same diamond?

Across 3,319 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 245%, about £346.

Can I see retailers for one exact grade?

Yes. Each of the 26 colour and clarity combinations above has its own page listing the retailers that stock exactly that grade.

Does Carat Hunter earn commission from these retailers?

No. We earn zero affiliate revenue from any retailer in our index.

How fresh is this data?

Live listings refresh daily. Static facts about each retailer refresh weekly.

How is the retailer ranking calculated?

Strictly by active inventory count for this exact spec. The retailer carrying the most stones at the spec ranks first. There is no editorial input, weighting or affiliate consideration.

Why do you not show per-retailer prices on this page?

Prices vary per stone, not per store. Click through to any matched diamond and you will see every retailer's price on the exact same physical stone, which is the meaningful comparison.

Where to Buy 0.5ct Lab Grown Radiant Diamonds | Carat Hunter